Please note that this procedure only reverses the year end MTM prices that get entered in your current year data file when you are using MTM in the current year. If you are using the cash accounting for the current year, then no entries are actually made in your current year data file. Most all of the entries affect the next year data file which is now irreversible.
To reverse the End Tax Year procedure, click File, Reverse End Tax Year. This will reverse all year-end entries and restore the original data to your file.